// Copyright 2016 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "core/fpdfapi/render/cpdf_devicebuffer.h" #include "core/fpdfapi/page/cpdf_pageobject.h" #include "core/fpdfapi/render/cpdf_rendercontext.h" #include "core/fpdfapi/render/cpdf_renderoptions.h" #include "core/fxge/cfx_fxgedevice.h" #include "core/fxge/cfx_renderdevice.h" #include "core/fxge/fx_dib.h" #include "third_party/base/ptr_util.h" CPDF_DeviceBuffer::CPDF_DeviceBuffer() : m_pDevice(nullptr), m_pContext(nullptr), m_pObject(nullptr) {} CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {} bool CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext, CFX_RenderDevice* pDevice, FX_RECT* pRect, const CPDF_PageObject* pObj, int max_dpi) { m_pDevice = pDevice; m_pContext = pContext; m_Rect = *pRect; m_pObject = pObj; m_Matrix.Translate(-pRect->left, -pRect->top); #if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE); int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE); if (horz_size && vert_size && max_dpi) { int dpih = pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10); int dpiv = pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10); if (dpih > max_dpi) m_Matrix.Scale((FX_FLOAT)(max_dpi) / dpih, 1.0f); if (dpiv > max_dpi) m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv); } #endif CFX_Matrix ctm = m_pDevice->GetCTM(); m_Matrix.Concat(CFX_Matrix(FXSYS_fabs(ctm.a), 0, 0, FXSYS_fabs(ctm.d), 0, 0)); CFX_FloatRect rect(*pRect); m_Matrix.TransformRect(rect); FX_RECT bitmap_rect = rect.GetOuterRect(); m_pBitmap = pdfium::MakeUnique<CFX_DIBitmap>(); m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb); return true; } void CPDF_DeviceBuffer::OutputToDevice() { if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) { if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) { m_pDevice->SetDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top); } else { m_pDevice->StretchDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top, m_Rect.Width(), m_Rect.Height()); } return; } CFX_DIBitmap buffer; m_pDevice->CreateCompatibleBitmap(&buffer, m_pBitmap->GetWidth(), m_pBitmap->GetHeight()); m_pContext->GetBackground(&buffer, m_pObject, nullptr, &m_Matrix); buffer.CompositeBitmap(0, 0, buffer.GetWidth(), buffer.GetHeight(), m_pBitmap.get(), 0, 0); m_pDevice->StretchDIBits(&buffer, m_Rect.left, m_Rect.top, m_Rect.Width(), m_Rect.Height()); }